navigation aid
短語詞組
- navigation -aid system 航標系統(tǒng)
- Navigation aid supervision 航標監(jiān)管
- ground radio navigation aid 地面無線電導航設備
- navigation aid facility 助航設施
- radar triangle navigation aid 雷達三角導航設備
- navigation aid administration 航標管理
- ship radio navigation aid 船載無線電導航設備
- radio navigation aid 無線電導航輔助設備
- construction of navigation aid 航標建設 返回 navigation aid